If you are new to our bags, do not purchase too many in the first time, and contact us if you meet any problems in using our bags. The links of 100 and 50 pcs of our bags are as follows,   https://www.ebay.com/itm/263576588509

Description:

• Five sizes (Eight variations) for choice: 8×32 cm (=3.15×12.6 inches. Curved seal in bottom. Better to put less than 160 ml of water inside if used for shipping) / 10×28 cm (=4×11 inches. Straight seal. Better to put less than 250 ml of water inside if used for shipping) / 10×28 cm (Curved seal) / 15×25 cm (=6×10 inches. Straight seal.  <400 ml of water) / 15×25 cm (Curved seal) / 19×28 cm (=7.5×11 inches. Straight seal.  <650 ml of water) / 19×28 cm (Curved seal) / 18×36 cm (=178×356 mm=7×14 inches. Curved seal.  <1000 ml of water )
• This special bag is designed for the transportation of live fish, shrimp, snails, aquatic plants and other organisms requiring oxygen exchange. The special molecular structure of plastic film generate constant O2 and CO2 exchange.

Suggestion for use:

• Directions: fill the bag with water and aquatic lives, curl the opening part of the bag tightly, then bend the curled top area and enlace with rubber bands (or just tie the curled top area as tight as you can).
• Tips for delivery: bag should not be too full of water, wrap bag with air-permeable material like newspaper to make it stronger, fill the remaining space in the box with sufficient buffer, do not put too many bags in the same box without separation.
• To be safe, double packing (put one bag into another) is acceptable, but please keep space between the two bags dry (you can insert a paper between the two bags), otherwise it would seriously affect the oxygen exchange.  
• The success by using breathing bag is also depend on the way of packing and the status during transit (e.g. temperature). We welcome all customers to conduct experiments to compare efficiency of our bags with all other breather bags, but it need to be conducted in same condition (pls use same species in similar size and condition, with same volume of water, and under same temperature). If you are new to our bag, please contact us to take detailed suggestion for packing which is illustrated by photos in every process.  

Shipping:

• We usually ship product within 3 business days (business days do not include holidays. Packages need to be sent to express agent first, it usually take 1~3 business days to obtain the tracking number). We offer the following shipping methods for the buyers from different countries to choose.
• SpeedPAK (SpeedPAK Standard is a bit faster than SpeedPAK Economy). Shipping usually takes 10 to 25 business days in total. For countries: United States (usually 8~15 business days), Canada, Australia, and all European countries. We may choose to use FedEx instead of SpeedPAK Standard for some large orders, so that you can receive bags faster (parcels usually need to be air shipped to the destination country by a third-party company and then delivered by FedEx).
• Economy Shipping from China (=China Post Air Mail). For all other countries to that SpeedPAK can not ship. Shipping usually takes 20 to 45 business days in total.
• For buyers from the countries that are not in our selling areas, please contact us for other shipping method and cost. We can sell and ship to almost every country.
• Please note that there is some uncertainty in the delivery time of international shipping, which may be caused by delays in custom clearance or flight schedules, and these factors are beyond the control of the courier company and us. The above-mentioned deliery time for different shipping method are for reference only. Please arrange for receipt based on the time displayed by ebay system. If you are in a hurry to receive our products, please contact us before purchasing to use the fastest possible shipping method (shipping cost is higher), or purchase from our agent in your country.

Contact us:

• If you have any question, please leave message to us, we will reply in 24 hours.
• Please leave a positive feedback if you are satisfied with the product.
• If the parcel is delayed or you are not happy with a product for any reason, please firstly contact us before submitting case to Ebay or leaving a neutral / negative feedback, we will do our best to resolve the problem for you and make you satisfied.